text: #include <iostream>
  #include <string>
  #include "ppm_image.h"
  #include <cmath>
  using namespace std;
  using namespace agl;
  int main(int argc, char** argv)
  {
  	ppm_image image;
  	image.load("../images/corgi.ppm");
  	ppm_image gamma = image.gammaCorrect(2.0);
  	ppm_image invert = gamma.invert();
  	ppm_image green = image.extract_green();
  	ppm_image lightest = invert.lightest(green);
  	lightest.save("result");
  }
  
  